derived-to-base.cpp
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// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
struct A {
void f();
int a;
};
struct B : A {
double b;
};
void f() {
B b;
b.f();
}
// CHECK: define %struct.B* @_Z1fP1A(%struct.A* %a) [[NUW:#[0-9]+]]
B *f(A *a) {
// CHECK-NOT: br label
// CHECK: ret %struct.B*
return static_cast<B*>(a);
}
// PR5965
namespace PR5965 {
// CHECK: define %struct.A* @_ZN6PR59651fEP1B(%struct.B* %b) [[NUW]]
A *f(B* b) {
// CHECK-NOT: br label
// CHECK: ret %struct.A*
return b;
}
}
// Don't crash on a derived-to-base conversion of an r-value
// aggregate.
namespace test3 {
struct A {};
struct B : A {};
void foo(A a);
void test() {
foo(B());
}
}
// CHECK: attributes [[NUW]] = { noinline nounwind{{.*}} }